In the US, I often hear that there is a list of people that can take power if everyone in front of them is dead or incapable of doing the job or resigns.

Like if the President is ever out, then the VP gets in charge. If the VP is out, then the speaker of the house gets it.

I'm pretty sure that list goes a lot further than that, even if the US never needed more than the VP before an election.

So how far does the succession list goes, and what is the order? Also, as a bonus: Am I wrong that only the VP was ever needed? Was there ever a situation where they had to go further down the list?